From ed42bbde1941d4121a1095d35e056a1c33cd0775 Mon Sep 17 00:00:00 2001
From: Vasil Zlatanov <v@skozl.com>
Date: Wed, 3 May 2017 22:48:25 +0100
Subject: Add counter class for inputs.

---
 src/counter.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 src/counter.h

diff --git a/src/counter.h b/src/counter.h
new file mode 100644
index 0000000..e0126db
--- /dev/null
+++ b/src/counter.h
@@ -0,0 +1,20 @@
+#include "mbed.h"
+
+class Counter {
+public:
+    Counter(PinName pin) : _interrupt(pin) {        // create the InterruptIn on the pin specified to Counter
+        _interrupt.rise(this, &Counter::increment); // attach increment function of this counter instance
+    }
+ 
+    void increment() {
+        _count++;
+    }
+ 
+    int read() {
+        return _count;
+    }
+ 
+private:
+    InterruptIn _interrupt;
+    volatile int _count;
+};
-- 
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